Special Guest Stars Gary Merrill as Senator Leroy Clark Guest Stars Susan Hampshire as Althea Hall Michael Rennie as Capt. Malcolm Smith Co Starring Lee Meriwether as Dr. Ann MacGregor Whit Bissell as Lt. General Heywood Kirk John Zaremba as Dr. Raymond Swain Wesley Lau as Master Sgt. Jiggs Don Knight as Grainger John Winston as The Guard Frank Parker as Countdown Technician Jean-Michel Michenaud as Marcel
